#5614: [with patch, not ready for review] add top-of-stack caching for
fast_callable
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Reporter: cwitty | Owner: somebody
Type: enhancement | Status: new
Priority: major | Milestone: sage-wishlist
Component: basic arithmetic | Keywords:
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Top-of-stack caching is a standard optimization for stack interpreters; it
typically significantly reduces the number of memory loads/stores. This
patch adds top-of-stack caching for the fast_callable float/RDF
interpreter.
Unfortunately, on my machine (32-bit x86, with Debian's gcc-4.3 version
4.3.3-3), this interacts poorly with gcc's register allocation heuristics,
so the resulting interpreter is actually slower than before the patch.
Doctests do NOT pass, and the patch is not fully documented. (I believe
the patch works; the doctests that fail are looking at fast_callable
internals that changed.)
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5614>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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